New stratigraphical results from the Tertiary sequence of the Midyan area, NW Saudi Arabia
Dullo, Wolf-Christian; Hötzl, Heinz; Jado, Abdul Raof
published: Jun 21, 1983
ArtNo. ESP026001202009, Price: 29.00 €
The stratigraphic section of Jabal Tayran starts with fluviatile sandstones and conglomerates overlain by alternating sandstones, marls, sandy limestones, and pure limestones, which to some extent exhibit a reef facies. The fluviatile part is considered here as the lower part of the Tayran Formation (Wadi al Hamd Member), whereas the sandstone and carbonate sequence is assigned to the middle part of the Tayran Formation (Wadi al Kils Member). Due to the occurrence of certain nummulites in the limestones, the Wadi al Kils Member is dated as Late Oligocene. Another alternation of conglomerates, sandstones, and marls overlies this member. Two intercalations of limestones also occur within this sequence. This sequence is followed by a section of alternating sandstones, marls, and siltstones. In this paper both units arc called the Wadi Telah Member, which is referred to the Early Miocene. The younger Al Bad formation (Middle to Late Miocene) is characterized by an evaporitic sequence with typical intercalations of clayey and sandy siltstones in the lower part and dolomites or fossiliferous limestones in the upper part. The fossils in these limestones are foraminifers, calcareous algae, and bryozoans of Late Miocene age. The Jabal Tayran Formation and the Al Bad Formation, both forming the Raghama Group, are overlain unconformably by the Late Miocene to Pliocene Ifal Formation.